dont know what its worth but never heard anything good about them...just not a real high quality piece..
if you want it...goto the range and shoot it..see how it functions for you...
hes actually giving you a bit more for both guns than i would...i can pick up used mossbergs for 135 all day...210 for a stock/factory 10/22?? pretty sure you can buy a brand new one for about that....so unless you got money into it, thats a steal...
but dont know what the tec9 is worth...other than a paper weight lol...