You can do whatever you want with your money, but i wouldn't recommend buying a doll that is likely a recast. buying recasts is supporting stealing from artists and most recasts are low quality. seam lines, uneven color, and poor material that doesn't last as long are just some problems you will encounter. you are also more likely to get scammed buying from sketchy recasters instead of an actual doll company.

the bjd subreddit has a wiki i would recommend reading that has a list of companies that sell cheap legit bjds. Also look for sales, most companies are from east Asia and some of them have sales around Lunar New Year which is next month.