Replying to Want to buy Used skis, in good condition for beginner skiier. what u gott???

K so my buddy wants to get into skiing next year, he has skiied before in the past and i wanna set him up on some twinners, im looking for a new or used pair of twinners in good condition, no edge missing, no core shots.
He is 5'10, and 149lbs.
i would say between a beginner and intermediate skier.
He will be skiing half park and half all mountain .
Were from ontario canada nothing huge over here, hills are smaller, parks are fun.
so i was thinkin maybe some invaders or something. What size should he go though?

OFFER UP PLEASE.