WTB: Sigma 10-20mm/Tamron 28-75mm

I am looking for
Sigma 10-20mm (dont mind if its the old version, though to be honest am not sure which version is better in terms of IQ)
and also
Tamron 28-75mm mainly for portraites.
These will replace my kit lens. I have Samsung GX20 at the moment.
Many Thanks

Have a look here, scroll down, Jack.
link

How much are you willing to negotiate on the 10-20mm?

Not a lot

Bump thread as am really looking for the Sigma 10-20mm
thanks