Support sales in test client

[codecov[bot]]

Codecov Report

Merging #64 (cccbad9) into main (0352c3c) will decrease coverage by 0.36%. Report is 8 commits behind head on main. The diff coverage is 60.00%.

@@            Coverage Diff             @@
##             main      #64      +/-   ##
==========================================
- Coverage   48.20%   47.84%   -0.36%     
==========================================
  Files           9        9              
  Lines         363      372       +9     
==========================================
+ Hits          175      178       +3     
- Misses        163      169       +6     
  Partials       25       25              

Files Changed	Coverage Δ
testdiscogs.go	0.00% <0.00%> (ø)
wants.go	66.66% <100.00%> (+3.33%)	:arrow_up:

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