I just ordered a couple platinum coins from Provident, and I noticed something odd. The number of coins they have in stock varies drastically from one coin to the next, with at least 10,000 Philharmonics in stock, but only 40 of the 2017 Eagles, just 5 of the random date Eagles, 100 of the 2017 Maples Leafs, and only 6 random date Maple Leafs. Also, they show a buy-back price for other coins, but not for the Philharmonics. Don't they want those? Are they generally undesirable somehow?