I have a desire to support DRM free gaming, but I too have limited gaming dollars. I have no doubt that The Oil Blue is worth the $15.00 asking price, but for me personally there are too many other things in life that call out for my money (e.g. bills, eating out, supporting causes, etc.).
In my case I have put off buying The Oil Blue because of its price point. I have resigned myself to waiting until it hits the $10.00 mark and then I will likely pick it up through GG, or directly here.
I know that may be some time off in the future, but $10.00 is my target window for the vast majority of games I buy.
All this is in no way saying games like The Oil Blue is not worth the money, because I think it is, and even more so due to the fact it is DRM free.
Anyway, that is where I stand at this stage. My hope is that The Oil Blue does exceptionally well and affords Vertigo Gaming the ability to make other games in the future.
EDIT: Wow, 30 days and not a single new post on the forums. Lowering the price may not be a bad idea at this stage.