Opinion:PSaudio/Robertson audio pre/amp

Does anyone have an opinion on the following equipment; Looking at a PS audio IV pre-amp and Robertson Audio 4010 power amp. the vendor is asking $ 800 CDN (OBO). Is this decent equipment for the price??
The PS Audio and Robertson were bot good units in their day. However, I am willing to bet that the current retail on both units is significantly less than $800 in the Orion Blue Book (which will also tell you the wholesale price your dealer paid for the units). If you like PS Audio, you should be able to pick up a used 5.5 (a much better pre-amp) for about $300. Also, if you check out some auctions, I'm sure you can find a much better and more recent amp for $500 or less. Needless to say, it doesn't sound like much of a "deal" to me.
Do you want to try Transcendent Sound's Grounded Grid?
(www.transcendentsound.com direct.)

to find today a unit new which sounds as good or better than the 4010 will cost you approx. $4,000. So IMHO, even though the blubook value is probably less than 800, this amp. in good condition is so rare that you should not hesitate and buy it asap (if is is in good condition).

Take care