1 mod combo is not so good, but high base armor might get you little interest - Iwouldn't expect more than 10k though.
2 you can merch this. Nonmax mods are only worth something if charrslaying for melee weps or +1 attr mods for staves in dom/death and few others.
3 no warriors dream
runes are pretty much worthless since there are plenty - knights unsal gets you maybe 500g, absorption less
4 no. Merch. The bonus is worthless.
5 nothing special. An average purple sword. Rinblade from ascalon is better, mods are far off and not the wanted ones. Merch.
6 decent is different. This one would be okay for a starter bow until you hit lvl2, but entirely worthless. Merch.
7 ye maybe someone wants an enchanting axe bonus, at least it's max. Maybe you get 5k, bit not the easiest sale.
Generally:
blue weapons are worthless. (Unless charrdlaying mod)
Runes are worthless for most, commonly used ones go in the 100-500g range, rare (fire, dom) go into platinum range.
Purple weapons are worthless unless they have any usable max mods, charrslaying etc of course give shitloads of money, the weap itself only if high damage (melee) or high hsr/hct values (caster)
Hope it helps you as a rule of thumb.
For a better feeling check the presearing boards forum - the pc-section has a good weapon pricing guide. Reliable for telling between merch and sellable at least.