There are several threads that discuss the prices of the armor types that are introduced later in the campaign. No prices are given i KAP5/5.1.

I've made my own price list (http://nocturnal-media.com/forum/index.php?topic=2463.0), and there is the How much should gothic and full plate cost? (http://How much should gothic and full plate cost?)-topic, the Armour Prices (http://nocturnal-media.com/forum/index.php?topic=2344.0)-topic and the Cost of/Profit from Horse and Armour (http://nocturnal-media.com/forum/index.php?topic=2335.0)-topic. These discussions are assume that there are no prices given anywhere in all KAP publictions. This is what I thought, too.

Turns out, we're all wrong.

In King Arthur Pendragon Book of Knights, a Green Knight product, that is basically a kind of KAP4.5 - a rules light rule book for playing KAP - there is a complete list of prices for armor.

It goes as follows (I ignore light armor and shields here):

Normal Chainmail £2
Reinforced Chainmail £4
Partial Plate £10
Full Plate £16
Gothic Plate £24

Trapper 120d. [5 pts]
Light Barding £2 [8 pts]
Chain Barding £10 [10 pts]
Reinforced Chain Barding £16 [12 pts]
Partial Plate Barding £24 [14 pts]

For your information, to use and abuse at will.

(Yes, I am aware of that Gregs current stance (?) is that Gothic plate can't be bought).