Mega dude, let me give you one advice: keep away from ebay!
Ebay is pretty dope for records, BUT its not a recordstore. That said ebay is real dope to get some ill shyt, if you know what you're looking for. In meanwhile I also "digg" on ebay, but I know what kind of ish I search for. If you just sitting there wondering what to type in to find dope samples, youll never get anywhere. Thats just hit and miss...
Build your knowledge from digging and buying records. If your stores aint all that, like you said, hit up the fleamarkets! Check padofeliac, he does antique stores and wellfare sales. There is always a gap to jump into. Dont sweat yourself with looking for "instant-collections" unless they have lots of stuff you KNOW is good and also isnt far away so you can pick it up. Shipping on a big stack is a bytch to pay for.
Once you graduate digging elementary you may proceed towards ebay
If you're really desperate you could always follow e.d.e's (?) advice and learn on the net. Google for funk groups. Check some discographies. Download some albums and figure out which lables/years/players/composers are dope to you. you will develope an own taste sooner than you think. Oh yeah, please dont post crappy loads of random records. we see youre stuggling but "look what i didnt buy" is fukcing pointless unless there is more to it than a pile of abba records
.toon