Not sure about that as this week I looked for a new AGM battery for the Jeep. I could get a Bosch from Tayna for about £159. fitting about £60. Went local to a garage with good reviews. They wanted £329 for the same battery incl fitting. Eventually they dropped the price to £239 which I accepted. They fitted the battery.
I then inquired about changing the smaller
aux AGM 12v battery which on Tayna was about £50. They quoted me £189 for the same battery incl fitting and would not budge on the price. I declined their kind offer even though I still need the battery. I would fit it myself if it was in a normal place, but it is under the driver's seat and awkward to access the bolts as need a long extension for the rachet. It also has the square terminal where the "tower" id fitted for where the nut screws down onto it.
In our village every month we get a small newsletter in the shape of a book which has numerous ads for local trades people. In the past we have contacted some of them and
IF they reply to a message left on their phone, they have silly prices.