What board? Does it include eye covers? What about a clamping feedneck? What trigger?
All this will be a factor in worth. If it has all the above.....it will be worth more to the $450 side then it would if you have to purchase these.
Also ask about a warranty card....you can have it transfered to you for $40 through DC if I remember right. Ask about the AKA lube, manual disc, and marker bag. Those aren't mandatory things, but are nice to have.