I think they're all somewhere between 10a and 20a- depending on the interest. If there's a bidwar and you wait it out long, there might be potential with some of these, but as a q8 15^50 Oni Blade is being spammed for 35a right now, I doubt that people would be willing to pay much more than what I PC'd.
Edit: Cleaver I'd say 5-10a, same for the celestial shield
1 Q8 OS Summit Axe +13^50 10a?
#2 Q8 OS Long Sword +12wS 3a
#3 Q8 OS Hand Axe +12% -1 health regen (Tyrian skin) 15a+
#4 Q8 OS Cele Shield -2wS +43wS 5a
#5 Q8 OS Cleaver +15% -10a while attack (Cantha Skin) 2a
none of em are close to perfect or have a prefered mod, imo no1 pays more than a few a for them. except for 1 and 3. especially 3. not a lot of prenerf dual vamps around i think
i agree with foxy, 3a for that long sword is way to less imo ... nice skin+prenerf, id say even a high req one with 12wS will bring 3a easy
cele shield i agree with laurens
Just a reminder that an Arm is like 65e or so right now - If you'd offer me a q8 Longsword for about 200e, I'd take it - no matter of the mod 
Even cleans would go somewhere there probably.
