Lenses worth

Hi,

I planning to goto a shop tomorrow (UK time )who has offered me part exchange on some lenses
just wondered what they maybe worth and perhaps i could sell here

ALL Canon Lenses
135 f2.8 soft focus
50mm F1.8 - has a metal mount
28-80 F3.5-5.6 MKII - NOT IS
28-105 F3.5 - 4.5 NOT IS
75 - 300 F4-5.6 MKII NOT IS

All sorted offered £300 for the 4lens - and gave them 28-80mm - dont have the space to keep odd lenses

probably a decent price. The 135mm f/2.8 SF and 50mm f/1.8 MkI are decent lenses. The rest are virtual throw-aways...

Haven't seen the soft focus for sale in the forum here before, but I know the 50 f/1.8 metal mount goes for a good bit-- around $200 (USD, sorry don't know the conversion).

Thanks, I was getting to that conclusion , the value in those two primes

A lot of my kit is going that way
Also have a 430EZ flash, that seems to be throw away or a slave light
And BAGS of Cokin A filters