STIHL HS 81R AND STIHL HS 86T PROFESSIONAL HEDGETRIMMERS ?

Hs 86t is a 30" single bladed model and the hs 81r is a double sided 24" model with original stihl blade cover will sell for best reasonble offer or swap for chainsaw/stihl saw/izy lawnmower/brushcutter or WHY these hedgetrimmers cost around 600 each new so if swapping then must be of similar value