does the location of the server matter?
If not, you can try burst.net for a linux one, they are pretty cheap and decent. (My friend has one and it has been doing okay for the past few months for what he pays).

The requirements of your script depend on your vps itself (not the provider), so you will need to install mysql, php, gd, etc.

If the location does matter, then you

You can try OpenVServers, (contact them @ -> Sales@OpenvServers[dot]biz)
I'm not sure if they have stock at the moment or not, but if you are willing to wait then i'm sure it will be worth it.
Sandino Reviewed by Sandino on . Need suggestion about VPS for Image Hosting Site Hi Guys, Can anyone suggest me a good and cheap VPS for a new ImageHosting site. Script requirements are: MySQL Database Server PHP: Hypertext Preprocessor 5.0 GD Graphics Library or Imagick Image Library Rating: 5