I went to a garage sale early this morning and found a STIHL , MS , 261 model . It sat for two years , full tank of fuel , chain oil , three bars ,(16" , 18" and a 22" . Her husband had passed three months ago and she was moving with her daughter in Pittsburg . It was an estate deal , everything for sale , tools , furniture , etc. ! She had a price on the saw of $250 . No haggling , I gave the $250 . What should I check and change considering it sat two years ?