Replying to What to do...?

Heres the story, i bought new skis about this time last year, i bought 168 volkl expressions. Well since then i've grown a load and i am now about 6' maybe a little under. I just made 200ish dollars and im deciding wether or not to ski another year on my expressions or to sell them and buy some longer skis. Any suggestions on what skis i should get? (i ski park and groomers on shitty midwest snow). And is anyone interested in buying my skis? they were only used about 20 times and werent used on rails. Thanks for any input