ATM 10mm thick float glass

["Paul Forshaw" <paul@4shaw.freeserve.co.uk>]

I am looking to buy an 8 inch glass blank with which to make my first mirror
( F7 for a portable dob.). The going rate for a 1 inch thick plate glass
blank seems to be around £30 ($50) here in UK. However, a local glass
supplier recently offered me a 9 inch diameter, 10mm thick float glass
(=soda lime ?) disk for less than a third of this amount. I accept there
will be work to do to bevel the edges and grind the back flat, -but-

1) am I deluding myself that such a thin chunk of glass could be turned into
a decent mirror ?
2) for a first-time glass pusher, would I be better off paying up the $50
for a standard thickness plate glass blank ?
3) is float glass really that bad - just the mention of it on s.a.a elicits
sour faces (or their electronic equivalent) :-)

Thanks,

Paul