Is $1800 fair for a used Deizel Einstein 50W head?
There are no completed listings on eBay for these, which is what I would generally go by. Assuming all is well with the condition of the amp and I like the sound and such, would I be making a smart buy at that price?
That's a very fair price IMO. I know prices are down nowadays and I haven't been watching the Einstein prices, but these amps went for $2,300 or so a year ago.