Give the guy a break,🙄
If it puts anyone's mind at rest I have had a bike and a frame from the seller in the past.(from LFGSS)
They're honest and straight forward to deal with ,if very busy with work sometimes .
Wouldn't hesitate to buy from them again,but occasionally a little patience may be...
Definitely a Blackburn?
I think they are Showa racks on my Portage, although I've had for ever and may have swapped them over at some point and forgotten.