Vlookup and Match function [vba--userform]

[feixiiin]

Hi,

I am facing some problem when it comes to vlookup and match function in vba.
First I having two option to choose: Selling or Buying.
If either one option is choose, the vlookup value and match value is different.
The vba i used could not work out as what i want.
Which part I was wrong?

Please refer the attachment.

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