Hoping someone could help me get an idea of pricing for this combo amp. All I know is that it's vintage (late 70s early 80s most likely), solid state, and supposedly popular for its cleans. I've seen a few of the 112, 115, and 212 versions sell for anywhere from 150-250 online, but can't find anything about this 410 version.
I posted this same post on ultimate guitar and had one reply in which a user provided some extra info : it appears to be a mk i, and the amp also had a mk ii and iii version, both of which sported parametric eqs. It seems that the 410 version is a bit elusive though , I can hardly find  a thing about it online.

I'm wondering if anyone would help appraise it, as my just recently  dad got his hands on one and is looking to sell it. If anyone has any idea of what he could reasonably get for it I would really appreciate the help!

Here are some photos he took and sent me to post for him:
http://imgur.com/a/aqFpT

Thanks dudes