You have to ask yourself, "Is this set worth $300 to me?" Because it's unlikely that anyone else would find that this particular set would be worth $300 to them.
That may sound like a snide answer, but I am being sincere- sometimes market prices are irrelevant if something "speaks" to you for whatever reason. Go with your gut feeling on this one- but don't expect to fix it, flip it, and double your money; at least in the first half of this century.
Model 15 is an AC set. Model 15-B is the battery version. For the battery version, the illustration on this site shows the two batteries mounted inside the cabinet to the left and right of the speaker. Sounds like you have the battery version; but check the ID plate to be sure. Or look at the audio output tubes- the AC version uses two type 45 tubes, the battery version uses two type 31.
Tom : I can't really tell from the schematic, but is the radio in question a TRF or superhetrodyne? Second question is how hard is it to find those old #30 and #31 tubes ? Thanks.
-Bill
Ask the seller if the tubes come with the radio? If they do they are probably good (original).
The tubes can be found on a lot of tube seller sites but can be very expensive.
I have two battery operated radios that use these tubes and needed four of the 32's. Found them on ebay, very expensive.
Mitch
It's a TRF, with four stages of RF amplification. #30 aren't hard to find or very costly (I bought one from a used-tube dealer a couple of years ago to replace the one in my Philco Mystery Remote Box, and it wasn't horribly expensive- several bucks, as I recall). Can't say about the audio output triode #31 tubes- never owned anything that uses them. But if they are like other vintage audio output triodes, they are probably relatively expensive.