There is no reason to feel bad about this. The simple reality is that no matter WHAT happens someday the proce of a product will drop. Thats simply the way the market is... thats the way ALL markets are. Is it unfortunate when you buy something and it turns up on sale? Sure. But do I feel that any merchant I ever bought something from has a responsability to make sure they never take a good offer to sell their product, or never lower their price? Hell no.