I know what you mean. We just replied to an add on craigslist for an 11 year old female with a 90 gallon tank that they only want 45 dollars worth in the picture we looked at she has no issues but of course if we get her its right to the vet then into 60 day quaritine. I'm hoping she's completely healthy though I'm worried because that put a heat rock in her tank hope well be able to give her a better home.