It is easy to spend big money on Japanese swords, both antique and modern. The sky is the limit depending on how deep your pockets are, so spending 35K is easily done. So many factors contribute to cost that it is impossible to give exact prices on anything except what is currently for sale. Things like the sword smiths status and reputation. For example, Yoshindo Yoshihara, and I won't go into whether he is the best Japanese sword smith living as that will always be subject for debate. However, he has been awarded the title of "Living National Treasure" of Japan. Therefore, his works are going to cost more than an unknown smith's would.
Not much different than it is here. Price a knife by some basically unknown knife maker vs. the cost of a knife by someone like Joe Keeslar MS. BIIIG difference.
Where you spend the biggest bucks is if you decide to custom order direct (broker) from a sword smith in Japan. And again, costs are determined by smith, blade length, style, polish, koshirae vs. shirasaya. You can spend big money on having just a koshirae built in Japan.
Does that mean one can not get a new sword for less than 25K+, not at all. As stated above, it is possible to get a modern Japanese katana for substantially less than 35K. Though not sure about Yoshihara's stuff since receiving the National treasure status. The last two I saw in San Francisco were wakizashi in shirasaya priced at 35K. His kogatana sell for $2500 plain, and $3500 with horimono.
Many times it is just a matter of having the patience for the right blade to come along. Occasionally, swords are ordered and the buyer backs out. Or, swords are bought and later the owner experiences financial hardship and sells for a mere fraction of what he paid, or the owner dies and the family sells just to be rid of it.
Some of the best deals on modern made swords, are those which are not brand new custom orders.
Here are several current example:
1. Katana by Musashi Kuniie (Yoshindo's brother), custom order made in 1987 = $14,000
2. Katana by Tsutomu, made 1990 in koshirae = $9000
3. Katana by Misuoki, made in 1982 = $5500
4. Katana by Yoshihisa, made in 1989 = $5800
So good deals on modern Japanese swords can be found for way under the 35K mark, but in general Japanese swords are not cheap.