quick wheel question?

I just now saw an add in the classifieds section in todays paper saying:
Like New, 4 18" allowy wheels, chevy, 6 bolt, off 07' avalanche, center caps, lugs.

i'm guessing that's the correct bolt pattern i need for my mazda, could anyone post or like me to a picture of what these look like. i tried to do some searching but couldn't come up with anything that i wasn't 100% sure about. i'm guessing they don't come with tires and what kinda offer would you make cause there is no price. i'm gonna call the guy once i hear from you guys.

thanks and asap would muchly appreciated, i don't wanna lose these.
~Michael

yeah they are the same lug pattern but the center bore on the chevy wheels are smaller so you will either have to bore the center of the wheels out or grind the metal tabs off your hubs

just called him and he said $50 a wheel
anyone know the width? and still wanting to see pics before i go see them tomorrow if that's possible from you guys.
i think i'm gonna snatch these up so hopefully all goes as planned.

they are either a 7 or 7.5 dont have any pics though

just search on ebay "18 avalanche" and look at the results. There are probably a few different designs as GM is horrible about making like a 1000 different wheels....guess its nice to have variety....anyway,,,,,regardless the tires IF still on the wheels would need to be pulled unless your rollin HIGH and I would bet any set of Chevy 18s you find will look sick with a 40 or 35 series tire wrapped around them Expect to pay $100 per tire though....all said and done...$200 for the 18s is not a bad deal at all

yeah i just went to go see them, they are in perfect condition for what they are, but the 5 spoke pattern didn't look very good, and they are 8" wide, and the center caps had the chevy logo on them so i'm gonna pass on these ones.
i hate it when i get my hopes up.