i had an ad on craigslist, looking for a cabinet style bator. this person responded that they had a gqf sportsman and i could look it up on the internet because he didn't have any pics. what should i pay for this? i asked him several more ?'s like how old and working good? model? so hopefully i have more info. but was looking for a ball park, so i don't waste anyone time if it is too much. thanks for your help and happy hatching.