new tyres + wiper blades fitted

Hello forum replaced my .
wiper blades today (old ones split and noisy) also two new back tyres fitted Avon ZV7'S cost 176.00 booked online but in the office of this company cost was 227.00 very strange how it works.
The old ones were a tyre called Rovelo rpx 988 (Chinese brand) put on in week 3 2015 and the second was a continental put on in week 39-2010 yes on from new so it was very ready for changing by many years.
Strange thing was the remaining tread was the same amount left but 5 years between them.
As my wife tells me =one price one quality.
Had my bluebird for 3 weeks now so getting there slowly but what a joy to drive.