1/2 oz Gold Libertad 2008 Proof: Value & Prices

If you have a 1/2 oz Gold Libertad 2008 Proof, you are holding a genuinely scarce coin. Only 500 were struck. That low mintage, combined with half an ounce of pure gold, puts its value well above melt: expect it to sell from the gold value floor (roughly 1,200 to 1,400 USD as of 2026, moving with the gold price) up to 1,800 USD or more for a flawless piece with original packaging.

This is one of the rare cases where the myth is actually true: this coin is worth real money, for two concrete reasons. It contains 0.999 pure gold, and Banxico (Mexico's central bank) minted only 500 of them in proof finish. Most old coins people inherit are worth a few dollars. This one is not.

What this coin actually is

The Onza Libertad ("Liberty Ounce") is Mexico's flagship bullion series, the equivalent of the American Gold Eagle or Canadian Maple Leaf. The design shows the Winged Victory (Ángel de la Independencia) on the reverse and the national coat of arms on the obverse.

The 1/2 oz denomination is a fractional size, containing half a troy ounce of gold. "Proof" means it was struck with special dies to produce mirror-like fields and frosted raised details, aimed at collectors rather than investors buying bullion in bulk. Proof coins are sold in sealed presentation packaging and carry a premium over the plain "business strike" versions.

Specifications (Banxico official)

Spec	Detail
Denomination	1/2 oz (media onza)
Year	2008
Metal	Gold, 0.999 fine
Weight	15.55 grams
Diameter	29 mm
Edge	Reeded
Finish	Proof
Mintage	500 coins

What it's worth in 2026

Two things set the price: the gold content and the collector premium from that 500-piece mintage.

The floor is the gold value. Half a troy ounce of 0.999 gold is worth whatever gold trades at that day. This coin can never sell for less than its melt value, and the gold price is easy to check on any financial site.

The premium comes from scarcity and condition. With only 500 struck, and even fewer surviving in perfect shape, a graded proof example commands a real markup over melt.

Condition	Approximate value (USD, 2026)
Gold value floor (melt)	1,200 to 1,400 (tracks gold spot)
Nice proof, some handling	1,450 to 1,650
Flawless, original Banxico packaging / high grade	1,800 and up

Prices move with the gold market, so treat the floor as a live number, not a fixed one. The collector premium above melt is what stays relatively stable.

How to tell if yours is genuine

Gold coins get counterfeited, so verify before you trust any offer.

1. Weigh it. A genuine coin weighs 15.55 grams. Use a jewelry scale. Fakes are almost always off, because base metals don't match gold's density.
2. Measure the diameter. It should be exactly 29 mm. Use calipers.
3. Check the edge. It should be cleanly reeded (grooved).
4. Inspect the proof surfaces. Real proofs have deep mirror fields and crisp frosted detail. Flat, dull relief or uneven color is a red flag.
5. Be suspicious of cheap offers. Any price far below the gold value is a warning sign, not a bargain.

For a coin at this value, professional grading and authentication (NGC or PCGS) is worth it. A coin in a sealed graded holder sells faster and for more.

Where to sell it

Because this is a precious-metal coin, only deal with a buyer who inspects the piece in person or through verified photos and weight.

• A verified coin dealer from the Pesoteca shop directory will appraise and buy it on the spot, using the current gold price plus the collector premium.
• The Pesoteca buy/sell forum connects you directly with collectors, who often pay more than a dealer for scarce proofs.

Before you sell, photograph the obverse, reverse, and edge, and check the value ranges above. Don't dump it to the first bidder on social media. For more on how condition affects price, see the Mexican coin grading guide, and browse the full Onza Libertad series to see how the other sizes and years compare.

Have a 1/2 oz Gold Libertad and not sure of the grade or the packaging? Post clear photos in the Pesoteca forum and let collectors help you pin down what it's really worth.

This piece is a 1/2 oz gold Libertad struck in 2008 in the Proof finish. The series was created by the DOF decree of April 8, 1981 and added the 1/2, 1/4, 1/10 and 1/20 fractions starting in 1991.

Felipe Calderón. The outbreak of the global financial crisis after Lehman. Gold spot closed near 870 dollars per ounce and the FIX at 13.83 pesos due to the peso shock.

Fraction: pure gold 15.552 grams at 0.999 fineness, total weight 17.27 grams, diameter 29 millimeters. The half ounce balances liquidity and heft: it moves enough gold to be a real reserve and remains tradable peer-to-peer. Premium over spot 5 to 10 percent, higher than the ounce due to prorated minting cost.

Proof: frosted mirror fields over matte relief, polished dies and multiple strikes. It comes encapsulated with an individual certificate. The Proof mintage is always a fraction of the regular, typically +40 to 100 percent over bullion.

Banxico CM10 (consulted 2026-05-27) records 377 pieces against 940 pieces in the regular version of the same year. The differential explains the price gap between variants.

The Proof is hunted for a complete set of fractions and for a certificate with its original capsule. When buying peer-to-peer, check the capsule for scratches, that the certificate is tied to the piece and compare the premium against the regular of the same year before a middleman.