A Dagger complete lower can be had for $99 on sale. I really like mine, so much so that I sold my G19 G4. (My G48 with 15 rd Shield mags also figured in that decision).
Original factory Glock lower parts will cost you a good bit more if you can find them. Most everything on the market is called “Glock compatible”, because Glock will not sell full up lower parts kits AFAIK. Trying not to fuel their aftermarket competition.