Responses
Are you only looking for physical copies? If you're okay with digital you could try buying ebook versions, they tend to be a lot cheaper. I don't really know of any specific sites, but I hear that Renta is pretty cheap? I've never used it but it seems like they have a pretty good selection and the prices are pretty low:
https://www.ebookrenta.com/renta/sc/frm/list?rsi=c&genm=Yaoi_Manga&col=info
went to search on taobao but to no avail, im really desperate, please some kind soul drop some links below T.T