Nothing much wrong with this.. unless he said he got a whip from them. Its totally possible.. i tried to do many trades at the chest in lumbridge and many high lvls go 'huh, a bank here?' If he's easily scammed, it wont matter if he's a lvl3 or lvl90. though, yes, you'll expect him to learn frm experience. best way is for you to check up on his stats and ask him qns appropriately. eg. if he has high fletching, ask him abt prices of yewlongs and stuff. high herblore, ask abt herb/pot prices and the way to break even. high con, ask him where his house is. lvl75 con, ask him to let you use his gilded altar. rc, ask him on tips for abyss.