Do you know which model you were looking at? There are several different models of the Mosin. I have the M44 Carbine with the attached/folding bayonet. There is also the M38 and 91/30 models IIRC, and a few others. Ask if they have the ammo pouch and kit that goes along with the rifle too. Mine didn't have it but its in good enough condition that I didn't mind (I have my own gun cleaning kit and mag pouches anyway).
Good luck with your purchase and keep us posted. FYI the 440rd ammo cans sell for about $75 at Aimsurplus.com. Add about $20 shipping and you're looking at less than a $100 for a good amount of ammo, much better than $50/100rds.