I got one off Hobby Link Japan like 12 years ago , I don't remember the price .

Micro Mark has insane pricing , I would never buy from them  -- I'm surprised they are still in business .

I just looked on Amazon .

I can't post specific product pages from desktop here on SMA , no idea why and Blackbeard looked into it  , but on this page look for the " phrozen Sonic Saber Cutter " at the top  :

https://www.amazon.com/s?k=ultrasonic+knife+for+plastic&crid=2C5S0J586EWG0&sprefix=ultrasonic+knife,aps,294&ref=nb_sb_ss_ts-doa-p_6_16

That isn't the one I have but it appears similar  , and similar price point .

I looked over mine for the manufacturer but all the text is in Japanese , except for specs  : 25 VA , 40kHz , 100 volts  and Made in Japan .

I love that thing .

Zero kerf cuts .