Having purchased a lot of my Amiga's and third party hardware back in the Amiga days it is a lot!
Some of the prices I can guess at and kind of remember are:
(?) = not completely sure on the price.
A600 - £199
A1200 - £299
CD32 - £299
Archos 330MB HDD - £299
1.3GB 3.5" internal HDD for A1200 - £?
4MB Ram expansion for A1200 - £179.99
1MB Ram expansion for A600 - £49.99 (?)
A4000 - £250 (second hand in 1996)
16MB ram for A4000 - £40 (ebay)
Philips Monitor - £199 (?)
Microvitic Multisync Monitor - £249 (?)
Power Computing external CD-Rom drive with Squirrel interface - £?
Power Computing High Density external floppy drive - £149
Rombo RT12 video capture unit - £99
SCSI Zip100 drive - £100 (?)
And that isn't everything I purchased, and doesn't include joysticks, mice, games and other software. However even estimating the blank prices above it comes to over £2500 for what is listed here. And to think I purchased most of this while still as School and college. Government grants were great!
And more recent purchases include:
Blizzard 1230 MK-IV 50MHz with FPU and 32 MB fast ram - £130
Buffered IDE interface - £11
A500 KS1.2 - Free
A500 KS1.3 x2 - Free
A500 Plus - Free
2MB PCMCIA ram expansion for A600 - £8
Replacement A600 motherboard - £10