Register cover - used envelope - stamp collection - philatelic collection with Gandhi stamps signature required - forgery ?

Recently I saw Gandhi stamp used cover with register post sold on eBay for $11 and $15.

Do you think this used cover has any value ?

Do you think chance of forgery is higher as cheater needs to just make rubber stamp or stickers  and apply on any stamps or envelope and make it as register post.

One can make more money by selling used cover then stamps.!!

Do you think following used cover from Montserrat and St. Vincent to Milton Keynes, UK are genuine ?

99.99% of the world people will have no idea about this countries.!!

In past I had seen forgery and shill bidding on used covers and register covers from Mauritius and other countries to UK.  

This are sold as Register cover - used envelope - stamp collection - philatelic collection but it is nothing by forgery or bogus(never existed).

http://gandhistampsclub.blogspot.com/2013/02/royal-mail-forgery-cover-from-mauritius.html

http://gandhistampsclub.blogspot.com/2011/05/mauritius-stamps-gandhi-stamps-1969-and.html

http://gandhistampsclub.blogspot.com/2012/12/great-britain-stamps-mauritius-stamps.html

So after reading above blog link what do you think ?

Now what do you think about following Register cover - used envelope send to Milton Keynes in UK. ?

So what do you think about this Register cover - used envelope with Gandhi stamps with signature required?

Is this genuine ?

Is this Forgery ?

Just do it yourself  - Never travel through postal system. ?

Thanks
GSC