$342. Sorry that's a crazy price.
Let me tell you my experience. When I Google searched to buy last year, many sites seemed to have Volume 2, I ordered... or thought I ordered Vol 2. $47.50 But it was Volume 1 that arrived & that was what the order for said. I had no way to tell where/when the switch occured but I was now alerted. I didn't have Volume 1 so I kept it & went back to searching. I found that many sites listed Volume 2 in stock but when I tried to order... like magic... the order was switched to Vol 1 so I halted the order process & cleared everything.
I exchanged emails with one likely book seller & explained the situation. The seller said they did indeed have Volume 2 and offered to sell it to me for $100 + $5 Shipping. I accepted the offer but promised I'd return it instantly it the wrong volume appeared, since I already had it. Well, the correct Volume 2 arrived. I shopped hard to get a good deal.
This was my experience just a year ago.
PS I tucked my reciepts into the front of each books so that my heirs & asignees forever will realize they are collectable.