I don't own one but I have 5 Gibson guitars. They all play very well and I have a 1968 SG special with P90s and it always has been a great sounding guitar. If you can get a MIA Gibson guitar for 250, I would be all over it.
Apparently Gibson has made some strides in reducing the p90 hum. Which is usually cancelled only in the middle position on a two pickup p90 guitar.
I have heard some Youtube demos with it but the amps are usually pretty small in these demos. With a good tube amp you should get some great tones.
I don't think you could buy the electronics for this guitar for 200 bucks.
BTW they are selling for 499 on MF currently.
Be aware that the wrap around tailpiece Can only adjust up or down. There are no individual saddles. My 69 Sg has this and funny enough it has the lowest buzzless action of any guitar I own. The top wrap is supposed to give more sustain, and a lot of guys do it with their normal LPs. IF you can I would make sure the action is good before you buy.
Sounds like a deal to me.