Let's start with the ones I can see from here - the Eb mutes
Denis Wick Eb Straight
Denis Wick Eb Cup (I actually have two of these, due to various reasons - if anyone wants a brand new, unused one - let me know)
Denis Wick Eb Practice
Also on shelves and floor, within sight of here
Denis Wick Euphonium Mute
Denis Wick Trombone Straight Mute (gold bottom - 1 of a kind)
Denis Wick Bass Trombone Straight Mute (gold bottom - 1 of a kind)
Will update this later when I find out what is lurking in the boot (trunk) of the car - where my mutes tend to live.
I have a nasty feeling I am going to end up making Wilmer's list seem very short and concise

- although some of them I do have good reasons for, which I might even explain.
Now, where did I leave the car?
UPDATE - Well, I've found the piccolo mute bag
Jo-Ral Copper Bottom Straight Mute
Denis Wick Straight Mute
Tom Crown Copper Straight Mute
Marcus Bonna Cup Mute
Tom Crown Aluminium Cup Mute
Tom Crown Harmon Mute
Denis Wick Practice Mute
I have also found the box of mutes for sale:
1 x Denis Wick Practice Mute - £15
3 x Denis Wick Wooden Straight Mute - £23 each
1 x Denis Wick Eb Adjustable Cup Mute - £20
1 x Denis Wick Metal Straight Mute - £15
1 x Denis Wick Plunger Mute - £10
I also have a number (20!) of slightly small Bb practice mutes - NOT Eb practice mutes. These were a batch that were made using the wrong measurements. They work well, but are very close fitting on some bells and actually touch the metal on others. With an added layer of cork or foam they work quite well - could be a cheap alternative for those who find the regular practice mutes too expensive.
These are being sold for £5 each.
Now - where did I leave the rest of them?