买=buy 卖=sell，chinese always not use”买不上”we always say“买不起（意思就是price is too high，买不到（意思就是have no this things） hope this answer can help you

这个具体语句具体分析喽。。。

是不是 卖不上价钱？？？ it‘s means something is not worth to buy,so if you wanna sell something,but the person who want buy it no willing pay the money that you expected~~~希望我说的是对地～～～～

hi- 意思是 买不到。 现在”买不到更常用些。

yeah, We rarely use it, I even don't kown the meaning of it.