Info on H.H. Scott Stereomaster

Check out the Scott website (www.hhscott.com) for some really good information on your Scott pieces.
You can keep an eye out on this site and on Ebay, for an idea on what your pieces might be worth.
I would definately be careful if you are thinking of plugging these pieces in. They should be fired up on a variac with the voltage brought up gradually. There is a lot of good restoration advice on the Scott sight, including some safety recommendations.
If they were restored and in pretty good shape they might be worth some money. But, in original condition, maybe $150.00 apiece, or what the market will bear.
Hope that helps.

In addition, don't fire them up unless they're hooked to a load such as a speaker or power resistor.

I've owned both pieces - still have the 350 tuner and love it, though don't listen to the radio much. I had a 299A...the 299 came in 3 versions (A, B & C). The 350 tuner also came in several versions (A,B,C, & D). That amp (at least the A version) Requires an fairly efficient speaker at only 17wpc, but is a very nice amp for the money you'd put into it. Antiquated connections on both, with screw terminals for speakers being very close together. Forget about using your fat, heavy wires here. Bias procedure is a bit more complex than modern tube amps - a manual would come in handy (available now and then online). There was a recent review in Stereophile of an Eico integrated tube amp from the same era, also modified, that goes gushing on and on about the sound. The article also endorsed the services of a particular restorer of those amps...don't know if they also work on Scott. I'd agree with the previous poster regarding price of an as-is version and the risks involved, though it may be difficult to find one for as low as $150 online since savvy sellers seem to know they are in demand. Garage sales and pawn shops may offer more bargains. Sounds like you already have two samples in mind. I had both of mine restored by someone in the industry who doesn't normally do restorations (a friend who owed me a favor). Plenty of folks doing nice restorations and upgrades on those amps but you'll be dropping some coin to have that done (I'd guess $400-700 for the amp and $200-500 for the tuner). Not quite as much for the tuners - probably an alignment would be necessary. There's some guy selling online that makes very nice replacement wood cases for the Scott line. If you are handy in the wood shop and have the original case it would be very easy to do yourself.