Three decades ago my father had UNILOCK bricks installed in the driveway. Over the years, as you might expect, the soil underneath shifted and there were several humps and bumps. Once I inherited the house I decided to have it re-laid, intending to keep the existing bricks.
If you are ever thinking of buying UNILOCKs and are shocked by their high price, well, this is why: not a single brick was cracked or broken, after three decades of cars parked on top and thirty seasons of freeze-thaw. All bricks were able to re-used. After a good power-wash, the bricks could have easily been passed off as brand-new.
Glad I was able to salvage all of them, since purchasing new ones would have rang up the bill to well above $12k.
Very glad I was put in contact with Mr. Interlock. Their name says it all: this is exactly what they specialize in. The project was on time and on budget, site was cleaned up, un-used bricks neatly stacked in the backyard. The driveway looks brand new - hasn't looked this good in 20 years. Probably could have saved a few bucks by going with the lowest bidder, but I figured it wasn't worth it: if this driveway is to last another thirty years, why not hire the best? And so I did.