CD-Singles - what is this worth it?

Hello,

I'm selling the following CDs on ebay:

http://cgi.ebay.de/ws/eBayISAPI.dll?ViewItem&item=250686493857

CD-Singles:

Brian May - Back To The Light (Part 1) CDS
Brian May - Back To The Light (Part 2) CDS
Brian May - The Business CDS
Brian May - Another Worlds CDS
Brian May - Last Horizon CDS
Brian May - Too much love will kill you CDS
Brian May - Why don't we try again CDS (limited, numbered, Tourposter)
Brian May - On My Way Up CDS (1)
Brian May - On My Way Up CDS (2)
Queen + David Bowie - Under Pressure CDS (1)
Queen + David Bowie - Under Pressure CDS (2)
Freddie Mercury - Living in my own CDS
Freddie Mercury - The great pretender CDS
Queen - Headlong CDSQueen - The show must go on CDS
Queen - Innuendo CDS (2x)
Queen - I'm going slightly mad CDS
Queen - Princes of the universe CDS
Queen - Heaven for everyone CDS
Queen - Breakthru CDS
Queen - Let me live CDS
Queen - Too much love will kill you CDS
Queen - You don't fool me CDS
Queen - A winter's tale CDS
Queen - I want it all CDS
Queen - Who wants to live forever / friends will be friends CDS
Queen - No-One but you CDS
Five + Queen - We Will Rock You CDS
Roger Taylor - Happiness CDS

Alben:
Brian May - Another Worls Live VH-1
Queen in nuce
Brian May - Furia
Pinocchio OST
Eddie Howell - Freddie Mercury - Brian May - The Man from Manhattan

What do you think - are they of any worth?

Would you consider selling some of those separatedly?

Or do you have other items for sale?