mate's rate BrE informal
mates' rate BrE informal

Dave was a motor mechanic and Carole got her car fixed at mate's rates.

He bought it secondhand direct from the firm in 1905, possibly at a "mate's rate" price since the Broadwood family were friends and near neighbours.

Mate's rate, mate's discount : cheaper than usual for a "friend"

If you have a friend who is a tradesman such as a plumber then he may give you trade rates, similar to "mate's rates".

Ask our consultants about our Mate's Rates.

BMX Land now in Glebe Not getting mate's rates on you BMX garb?

Mr Smith confirmed on Wednesday another five had been made available for sale to Indonesia, adding they would be offered "at mate's rates, or in other words bargain basement prices."

The Google issue, described by the shadow chancellor in the same edition (These mate's rates from Osborne let Google off the hook), is the latest example of a stream of multinationals openly refusing to pay their due taxes, making a mockery of the democratically derived tax system.