4.5x2" shaded welding glass

[JCornford]

Excuse my ignorance, I am not a welder, nor do I know anything about them, but I am after some information if someone would be so kind?

The previous tenants of my dads factory went bankrupt (defaulting on 6 months rent), I was in there today sorting the place out for some new tenants and came across a box of 4.5x2" shaded welding glass bs679-9ew, are these worth much and other than ebay could you recommend a good place to sell them?

I have 89 packs of 10 and 9 loose ones!

Thanks in advance for any help.

 

[wyn]

They cost about 30p each and fit the flip up type helmets where you just lift the lens part to leave you with a clear screen to look through.