New is expensive, but you have a warranty in case you have problems with the pistol. If you search/read on the forum you will see several owners that had to send their new 41's back for repair work, mine included. Fortunately for me it was one and done. My PC41 works great now and Smith and Wesson took care of everything, but getting the gun to the shipper.
If you buy a used 41 make absolutely certain you have right of return if you don't like it. My first used 41 looked great in the pictures, but didn't work worth a darn when I received it and worse yet I spent money on it in a vain attempt to fix it. Seller said, "Sorry, it's your gun, no returns allowed." Sad, but that's just the way it is today. Either way you go is a roll of the dice, but I like having a backup plan (warranty) just in case.
Depending where you are these days there really isn't much difference in price between new and used. I think the "buy used" advice is having an impact on used 41 prices. Today the only way I would buy used is if I could see it and examine it including a check of the bore before buying it. I would also do the same with a new one including a bore check with a bore scope. I would also ask the seller to field strip the pistol for a complete examination. One or two people on the forum have said they couldn't pull the trigger guard down on new 41's for disassembly so let the retailer/seller show you how it is accomplished BEFORE you buy it. If a seller won't let you scope the barrel, or show you how to take the pistol apart say thanks, but no thanks. A seller SHOULD know how to field strip any firearm he is selling and be able to demonstrate this to a customer. Just be aware that Smith and Wesson is having some QC issues, but not every new 41 is affected. I for one would have no problem buying new again as long as I could examine the pistol first.
Once you decide which way you are going to go, new or used, there are some other tips that can be given especially with new Model 41's. You can cross that bridge when you get there. Just remember new gives you warranty, but you must still do a good examination of the pistol. Used it is even more important to do a good examination of the pistol, but you absolutely need right of return. Good luck on your decision.
Rick H.