Arisaka’s are a bit tricky to price in Canada, but they do tend to be more expensive up here than in the US. However, $5k is absolutely insane. Personally, if I was looking for a nice matching and unmessed with Type 99 or Type 38 I’d be looking to pay around $2k… and if I found one for less than great. If I’m willing to accept some issues then you can definitely find them cheaper.
And as others have said, in the states you can still find them pretty cheap, but that is changing. Arisaka’s and Japanese stuff in general has seen a big jump in interest over the last while and prices are going up. It still seems like Arisaka’s can be found for really cheap, but thats mostly by guys hunting at estate sales/local shows/pawn shops etc. Being Canadian, and thus an online shopper in America, finding a really cheap Arisaka thats matching and with mum is definitely much more difficult than it used to be.