You can sell the lot on ebay, I've seen markers go on there. Just be careful with the description. Try not to advertise the Markers too much. I've seen people sell all there kit before and throw the guns in for free wink wink! you know what I mean.
Alternatively you can try here
http://www.p8ntballer-forums.com/Their classifieds are pretty good, I'm sure someone would be interested in some if not all of it.
Also the barrels can be used on other brands of marker, depending on what type of thread they are. It might be worth finding out the thread type, then advertising them by thread type instead. for example if there "autococker" thread, advertise them as "autococker" thread barrels. Also if the barrels are in two piece's, the half that screws into the gun is called a barrel back, and the half that screws into the barrel back is the barrel front. They should also have the sizes on the barrel backs e.g. 689, 687, 685 etc
Do you know what model of angel they are? I'm not really clued up on angels, they went bust before I really got into the sport.
As said before check the Air bottles, some usefull info here
http://www.ukpsf.com/paintballlaw.php
