It depends where you live and if you want all the features or just basic ones. From 100$ up to 250$ if you shop wisely. If you go with local sometimes it can be cheap, sometimes it can be expensive (depends on your location), while ebay / aliexpress can be really cheap, it's just a bit more waiting time.
This enclosure will fit ANY 3D printer. Just measure your printer, compare size with Prusa MK2/MK3 and make adjustments to lengths of the extrusions that you are buying. In BOM (and also modifiable 3D model) you will find lengths to perfectly fit Prusa, while it can be scaled in X, Y or Z without any issues just by adding for example +100mm to some parts on BOM. :)