So you'd rather loose a customer that can Net you about $1000 - $2500 a year plus word of mouth business for a quick $300 after you told said customer you would sell him the figure? Thats not a business decision thats greed.
Happened to me once, was buying a Loki off a shop in, retailed at €200 everywhere and then the price sky rocketed on eBay due to demand so he decided to try and make a quick buck and told me he would sell me it for €300... Never went near the store since, now I do all my business in Forbidden Planet, say I've spend about €1000 in a few months, money that other shop lost due to his greed.