+1 for the size considerations. But, if you look at the size of his stolen Trek bike (img grabbed from previous post) :



looks like a 53-54 cm or so to me max (21 inch size)

that said, the unknown blue bike is overpriced and not that great. Plus the fact that is nameless, makes it a bit difficult. If the Trek is the correct size (a rule of the thumb is to compare the size of its head tube to the size of the head tube of the stolen bike) you might got yourself a bargain.