They did release "The complete Television collection" on DVD and BluRay more recently. The DVD version is around $38. This includes seasons 1&2 as well as The Return but does NOT have FWWM or the Missing Pieces. The DVD for FWWM is listed as a 2 disc set costing $23. It's supposed to be a Criterion Collection and Amazon lists it as having The Missing Pieces.

The cheapest listing I found of the 10 disc bluray of seasons 1&2 with FWWM & The Missing Pieces is about $40. https://www.amazon.com/gp/offer-listing/B01GRU59XE/ref=tmm_blu_new_olp_0?ie=UTF8&condition=new&qid=1590929387&sr=8-5

The 9 disc set must have been super limited or something because that is over $100 now 😕

Edit: link to newer DVD set:

https://www.amazon.com/Twin-Peaks-Television-Collection-DVD/dp/B07W47FXLK/ref=pd_sbs_74_1/145-2943117-6420968?_encoding=UTF8&pd_rd_i=B07W47FXLK&pd_rd_r=6e6de695-0912-4572-8252-10cb3c49aadd&pd_rd_w=gaQQW&pd_rd_wg=DLJSE&pf_rd_p=12b8d3e2-e203-4b23-a8bc-68a7d2806477&pf_rd_r=2HGRAK8ZT7BXVK31B9YE&psc=1&refRID=2HGRAK8ZT7BXVK31B9YE

And link to FWWM:

https://www.amazon.com/Twin-Peaks-Fire-Walk-Me/dp/B073XXTP3L/ref=pd_bxgy_2/145-2943117-6420968?_encoding=UTF8&pd_rd_i=B073XXTP3L&pd_rd_r=bf0ca7bd-16e3-41c0-9b2e-9b7636de1496&pd_rd_w=oAZE2&pd_rd_wg=z0tFs&pf_rd_p=4e3f7fc3-00c8-46a6-a4db-8457e6319578&pf_rd_r=AC12ADHNCD7K6MSQ28VY&psc=1&refRID=AC12ADHNCD7K6MSQ28VY