70's Music Man Amps ( One Thirty 212 HD)

They were quite popular in the 70s. Most famously Clapton used to play one in them years. Listen to the Just One Night live album.
Leo Fender started the company in the early 70s, after Fender had been sold to CBS (was booted by his own Fender company?). The amps were launched as the next best Fender amps. I never played one myself but heard a couple. They have a tube power amp but transistor preamp, if I remember correctly. So great cleans but you'd need pedals to get good OD.

I owned a 74 script logo 2275 65 Watt 1x12.  These still had the tube phase inverter which in my opinion sounds a bit better than the solid state phase inverter.  One thing to keep in mind is that some of these amps have a solid state preamp section, so if you are a tube purist, keep moving.  These are also not set and forget kind of amps, it takes time to tweak the tone and once that is done, well it was one of the best and most versatile amps i owned.  Took pedals well for some higher overdrive.  I am not certain about he model you are referring to, but a lot of the early MM amps are supposed to run on 6CA7's and not EL34; although these can be used in the place of the other, I found that the 6CA7's had a tone that was between 6L6 and EL34 and that to me was gold.  Also take a look at the speaker sand transformers before you buy.  Although they were good quality, for some reason the transformers rust out and the speaker cones dry out.  BTW, did y'all know that the early Dumble amps used output transformers and power transformers from MM amps?

Just because Albert Lee was onboard doesn't mean he went all country. Doesn't sound country to me, apart from 'Lay Down Sally' and 'Setting me up' maybe. In fact, it's one of the best live Blues Rock albums...

I didn't mean he was pure country, but he had a lot more influence around him at that time then any other.  Tulsa Time is country but he blues it up, and lets not forget "All Our Past Times".  Its a wonderful Eric Clapton Album and one of my favorites.  The blues tunes still had a fire to them that some of his 80's work lacked, but what I really like is as much as I do all the stuff he did in the 70's is it has this hairy edge type feel, like they were very polished and still very raw sounding.  That might have been the Alchohol in him during those years but after he cleaned up his life I found his playing and his singing to be very polished.  Effortlessly going through songs, where in the 70's to me it felt like every note sounded like a struggle.  A lot of people don't like that time period for Clapton because he took to heart a less is more style and focused more on being a singer songwriter then his past God Status.  I'm one of the biggest Clapton fans on here I assure you and you'll never hear me bad mouth any of his playing no matter how polished it got, but right now I think since about 2004 until now is the most inspired I've ever heard EC.  NO joke!  He's on fire right now and just check the reviews people are just blown away by him right now.  As good as all this is nothing is better then when he was with Derek and the Dominos.  If you could only hear some of the bootleg concerts I've got of EC back then.  Their Filmoure album is not even a tenth of what they were really like!  These boys rocked!

Very true. But good for him (the cleaning up). 

Ok, so I'm the second biggest then. 

I would trust them to give you their honest opinion if the amp needed work.  They are a pretty good bunch of guys.  Ask them anything and you should get honest answers from them.  If it needs work ask them if they can have it worked on before you buy and add the repairs to the cost of the amp.  I don't know that they would do that but its woth a shot.  It might be a awesome amp in great condition that doesn't need anything.  But remember "A closed mouth is never fed."