The market here in the US has bumped significantly.  I have been buying good Modulus basses for the past several years, and I can report less than 5 original Flea basses equipped with factory Modulus-spec Lane Poors to come across my radar.  I was lucky enough to recently  score an excellent 1996 example of the Flea 4 with a LP,  all of the earliest features and a rare Satin Black finish and, thank goodness, an arrow straight neck!  It was well below $2000US  It is an awesome bass! 
I really love the Quantum basses, and prefer the pre-trussrod neck profile, but, again, be careful with warpage, particularly on the Q4s. 
Prices on the Quantums have escalated as well, with excellent newer truss-rod equipped examples (most prefer these) selling in the $2000 and up range, 40% higher than just a couple of years ago.  Fortunately for me, the earlier ones can still be picked up here and there in the $1500ish range, depending on a bunch of variables. 
Lagging behind are the other Modulus models, the Genesis, VJs, Vertex, and super-early ones...for now. 
FYI, Geoff Gould, the originator of the design, left the company in 94 and is building this style of bass today.  They aren't cheap, I have never tried one, but they appear to me to be awesome instruments and carry the graphite-neck torch forward in a most authentic manner. 
Can't post pics from work, otherwise I would.