Yeah unfortunately the cheapest Luigi's Mansion toy you can find right now is a Burger King toy, and not the nicest thing to give as a holiday gift lmao, and the $15 or so eBay price is probably too much for what it is.

Little Buddy makes Luigi's Mansion plush though. https://www.amazon.com/Little-Buddy-Luigis-Mansion-Strobulb/dp/B00RQKQDXU/ref=sr_1_7?keywords=little+buddy+luigi+plush&qid=1638393600&sr=8-7 https://www.amazon.com/Little-Buddy-1353-Mansion-Poltergust/dp/B00SH7B8R2/ref=sr_1_4?keywords=little+buddy+luigi+plush&qid=1638393600&sr=8-4

Those figures are great, there are also some individual ones sold of just Luigi.