T1 Barcode looks to be a 2004/2005 (euro BB?), but looks like it's had it's seattube cut down (there should be more metal above the seattube/toptube junction). Around £30-40 for that.
STA *looks* to be a late 90's one (looking at the extra gusset plates on the top/down tube + grind protector on the rear drops) Did it have AD990 lugs? You can tell for deffo from the serial on the BB
NG DB's frame only fetch around the £25 mark, 1 1/8" Pitchforks (dependent on condition) go for around the same.
Screamers go for anywhere around the £20-40 mark again dependant on condish.
2-Hip - you can still find 'em as NOS in places, but F&F prolly around the £80-100 again dependent on condition (although you're better off asking Munny about prices on them)
Have a look at the STA serial and will be able to tell you year and month it was made