If you can get it for $250, grab it and be happy. I have two, a .243 and a .308, dad bought the .243 in 1979 for $99 new, with a crappy scope, I bought the .308 in high school used in excellent condition for $300. Both of them are tackdrivers and if I had to pick my most accurate rifle, it would be the .308 or .243, can't decide. You'll love the 6mm for deer and varmints, I don't think there's a better crossover caliber for a handloader, 100 gr partitions for deer and 55 gr. Nosler BT's at 4000+ are deadly on varmints. Have fun with it, and if you don't like it in the 6mm, be daring a rechamber it to something like a .22 CHeetah, have fun!
Selmer