77, you bring up an interesting point. We are forever hearing about people listing firearms on the EE, which are actually listed for as much as a new one. Would it not make sense to pay as much, or more, for a pre Remington Marlin in great condition, which was designed and built for many years of carefree operation, than a new one which has many problems?
H4831, this is bang on, although I think people are willing to pay for a used rifle more for the instant availability than for pre-Remington quality (although I think that may be warranted).
My experience is similar to 77's. When I wanted to buy an 1894c in October 07, I realized that I was not likely to find on in stock, so I placed a backorder with SIR. The rifle was delivered in April 08 with some serious defects and went back to Marlin service in Sept 08. In May 09 I was told that my rifle would be replaced, but that I'd have to wait for another shipment. Fortunately, I'd already found a replacement (1992) and so Remington/Marlin was agreed to let me exchange the defective 1894c for a different model (a Rem 700 SPS SS).
I'd still purchase another new Remington/Marlin (although the delays were excessive, they were responsive to my requests - and the Rem 700 I received is very nicely manufactured), but I would want to inspect the rifle before purchase, which returns to the OP's question.
I think it is still very difficult to find 1894c's in stock. If you get bitten by the "must have now" bug, then you'll be looking to pay $700-$800 for one on the EE (there's one currently listed, I believe). However, if you are patient and persistent with searching around, you may find one with an actual "used" price in the $450-$550 range.
For example, I purchased my 1992 1894c with 150 rds of ammo for $475 shipped, and Ellwood Epps just had a current production 1894c listed for $549.
Unfortunately, even with our strengthening dollar, I don't think you'll find the price of new 1894c to ever return to what they were pre-Remington. When I backordered my 1894c in 2007, it was listed at $469 and when the shipment arrived, the price had increased to $518. Across the board, Marlins have increased substantially in price. If you look at the machining involved in lever action compared to a Rem 700, I don't think it's surprising that the cost of a new Marlin is at or above the cost of a Rem 700... it certainly put me out of the market for most new Marlins since used ones (excluding the 1894c) are still reasonably priced.