like a few others have said & thank you for the plug:
www.thecontentstore.com &
www.contentblowout.com are great.
you have 2 packages at content blowout, 1 is for $1500, another for $3500. Enough to fill up a site with videos/images on top of what you alreayd have.
Aswell you have TheContentStore where you can just buy the license to a few great DVDs have us encode it, or encode it yourself, cut it up slap ur watermark on them and you have 10 scenes and a few 100-1000 matching image sets.
we try to come out with deals every now and then, Our current one is an offer of 55 DVD titles 15000+ Images all from Lord Perious in a variety of niches for only $6000! Great price, good content, even better customer support. Hit me up anytime on icq or send me an email, both of which are in my sig.
Goodluck finding some content that suits your needs.