Hey guys, I have been browsing Kijiji in my local area for a small bass combo to use at home for practicing or coffee shop gigs and came across a 1970's roland cube combo. it has recently been serviced and clean and is in prestine condition. The catch is the guy says make an offer. I am little unsure what to offer and after browsing I have seen varying prices and offers online. What is your guys opinion? heres the add in case: http://www.kijiji.ca/v-amp-pedal/city-of-toronto/1970s-roland-cube-60-bass-amp-very-clean/603453216 Thanks!