Hi!

I'm looking at buying a Muhammad Ali signed robe, I am very much a beginner when it comes to collecting memorabilia, therefore would appreciate any opinions on the following items for sale on eBay.

Sorry if I haven't given enough details, not sure what I should be looking for, I've researched that I should look for a reputable company issuing the COA.

https://www.ebay.co.uk/itm/265269047159?hash=item3dc3446f77:g:vZoAA...

https://www.ebay.co.uk/itm/174531648067?hash=item28a2e59a43:g:C2AAA...

https://www.ebay.co.uk/itm/262539277056?hash=item3d208f7300:g:MJYAA...

https://www.ebay.co.uk/itm/263431093613?hash=item3d55b77d6d:g:NVsAA... 

https://www.ebay.co.uk/itm/124167473048?hash=item1ce8f54798:g:vWkAA...

Really would appreciate any tips or feedback, thanks once again!