A672-1986 “SPORT” FDC Royal Mail First Day Cover, Commonwealth Games Edinburgh

Title:
1986 “SPORT” FDC – Royal Mail First Day Cover, Commonwealth Games Edinburgh & World Hockey Cup (15 Jul 1986)
Category:
Collectables → Stamps & Postal History → Great Britain → First Day Covers & FDCs
Condition:
Pre-owned – First Day Cover issued 15 July 1986, featuring the full set of five stamps (17p, 22p, 29p, 31p, 34p) cancelled “First Day of Issue Edinburgh 15 July 1986”. 
The envelope shows some signs of age (please check for any creasing, toning or marks) — pictured above is good visible condition, though buyer should note any slight imperfections.
Item Specifics:
Year of issue: 1986
Issue date: 15 July 1986
Theme: Sport / Commonwealth Games & World Men’s Hockey Cup
Country/Region of Manufacture: United Kingdom
Denomination: Various (17p, 22p, 29p, 31p, 34p)
Cancellation: First Day of Issue (Edinburgh)
Quality: Used/FDC (postally cancelled)
Modified Item: No
Certification: Not certified
Quantity: 1 cover
Valuation / Price Guidance:
Considering age, condition, and typical market demand for thematic covers, a realistic resale value might be in the range of £5-£15, assuming good condition with no major defects.
Recommended eBay Listing Price:
I suggest setting a “Buy It Now” price around £12.00. This gives you some room for negotiation and is above floor value while still reasonable.
Auction Option:
If you prefer an auction format, you could start bidding at £4.99 with no reserve, to attract interest. Considering the value guidance and rarity, the auction could end somewhere between £6-£12 depending on bidder interest.