should be FAQ google TARIC database – this give you commodity codes and tarriff rates -its a good idea to have the supplier code the invoice with the commodity code otherwise the clearing agent (courier co’0 may guess it -you can get lucky or very unlucky
prepare to be corrected but goes like this
parts cost plus shipping to uk sum then add duty at this point 4% on parts, add vat 15% then add shipping co’s handling/clearance fee anywhere £10-£40
plenty of peeps go for having marked up as a gift or warranty rturn or lower value – if can persuade shipper and you can accept risk if gets lost