Hello, I work on product listing, but maybe i can't work completely the way u r asking for. Usually i put products ( usually 200 to 400 products) info in an excel sheet from a web along with a link of image in the excel sheet, and then send it to my employer. He then makes a process, anyway i don't know how he does it, which usually takes several hours, that makes all his products to be listed in ebay and bigcomm. then i use a software ( whose id is purchased by them, ) name linnwork. after i login, i find that products info are ready to be listed. there usually i set price, store, category, etc, and list it. :)
i work this way, so if u think i can work for u same way, i may be at your help. anyway, as i am in bangladesh, there is a issue of power, and internet also. if u can consider it, fine, i can work for u. if u can't consider it, well, no problem, just i can't help here. :)
well, there is another issue, there may be time when i can get order from u, and my current employer, altogther. in that case, u'r job may take some longer time. so if u think i can work for u, u can select a rate per listing, in which case, u won't have to be bothered about tine that much i think. :)