Trade/buy full-sleeve women's S/M wetsuit for sleeveless?

I have a virtually new, full-sleeve, Nineteen Pipeline, women's wetsuit, in size Med(fits 5'4"-5'10", 130-145 lbs) that has been worn about 5 times.  I am hoping to trade/buy a sleeveless wetsuit.  I just don't like not having the feeling of my arms in the water. I also have a very long torso, so this suit feels a bit constrictive in my shoulders.  I am, however, VERY impressed with it's durability and buoyancy.

I am 5'3", 135lbs.  I bought the suit on super sale in the off-season for $95, so we can figure out the math from there.  Here are the specs on the suit.

 http://www.hwynineteen.com/wetsuits/pipelineM.html