[A4] Going rate for modified A4s?

[Adam Morley]

Hi,

I've looked around at Edmunds and other used car sites, but they don't have check boxes for fun things like "modified."  I currently own a 1999 A4 1.8T quattro, and am looking at how much they are worth --- the whole "might buy a different car" thing.  It has every option (including the supposedly hard to find sport seats), and the following:

APR chip
BIRA System 2
APR exhaust
Short shifter
17" BBS wheels

Does anybody have an idea for whether this will increase or decrease the price wrt posted blue book/etc. pricing?  And if anyone's sold an A4 lately, what did it sell for?

thanks!

-- 
adam