I'd usually think so too, but where I live people are practically giving horses away the economy is so bad. Farms are closing everywhere. The barn I ride at has given 2 purebred, sweepstakes nominated Arabian colts away. It's a shame. I asked about his price, and if the lady was honest, it's just that. She wants to sell him soon before she has to pay any more board on him.
I kinda like him. He seems really sensible. He is very green, though. He isn't the greatest mover, but those riders aren't giving him much chance to be. With work getting him balanced and moving well, he might be a really nice horse.
Gabriel - long back equals a weak back - but with a fitting routine that focuses on top line, as collection does anyway, he'll build up some strength. It's just something you'll have to keep in mind all the time to work on.
I know that long back does equal weak, but it also equals the potential for more flexibility and correctly worked, it can mean a "softer" ride than the pounding of a very short backed horse. The good thing about Flame is that his whithers tie into his back WELL BACk, so if you look at him, his back isn't as long as you think. A lot of that visual length is actually his neck which starts way back behind the shoulder . This is good a long neck balances out a long back. If he had a short neck, then you would be in trouble. He has a kind eye and a relaxed face, unlike many Arabs who seem tense. I like his large , outwardly pointed ears. How are the feet? Large? This is important. His shoulder slope is decent. Hip is a bit weak, but he is just undermuscled right now.
I would watch how his owner rides him and this will tell you a lot. For example, if she rides him with his head stargazing you will see why his lower neck muscles are developed and the upper ones underdeveloped.
For the price you are talking, if the horse has a nice personality and good feet, I would take him and make him your best friend.