In reply to yh001:
There are some gorgeous approach shoes for sale...but do you need them?
I use a selection of...
Hi Tec Magnums - light, comfy, not waterproof. Decent grip
German Army paratroop boots (Mk 4, getting harder to find in nice nick) - super grip in all weather, high tops, and waterproof. Weigh a tonne.
DM Shack - looks like waterproof Magnum (but pricy at £110). Kight, waterproof, supercomfy, and amazing grip wet or dry.
....all of these are what I have around, and all suitable for daily transport (I ride a motorbike).
As others have said, there are cheap solutions, and approach shoes aren't necessary, though a lovely upgrade if you have the cash. But ask yourself, is there other stuff you need more than approach shoes?
(I would rather have Jetboil/flask, better rucksac, petrol money, plenty of extra slings and screwgates for trad, a couple of tiny cams...BEFORE I coughed up for approach shoes).