The specs of this particular Amiga are very far from standard.
It contains: A1200 motherboard.
Phase 5 50MHz 68060 Blizzard accelerator card.
Phase 5 SCSI interface card.
Zorro II Bus Board.
Buddha & Catweazle IDE and HD floppy interface.
1.5GB Hard Drive.
SCSI CD Writer.
IOBlix high speed comms card.
880K floppy disk.
Standard A1200 Specifications:
CPU: Motorola 68EC020 @ 14 MHz. Graphics: AGA chipset (Advanced Graphics Architecture). Display: Max 640 x 512 (PAL Interlaced) up to 262,144 colours in HAM-8 mode. Sounds: 4 × 8-bit channels. Memory: 2MB RAM (expandable). Software Media: 880K floppy disk.
Value:£35 - £55 depending on software and included expansions.
A1200s in Tower systems with extra processors and bus boards could go for as much as £300 or more. 68060 cpu accelerators can sell for £300 on their own, so bear this in mind.
Until I get the time to write a detailed article on the Amiga, here's a video I recorded about the system.
Amiga Chipsets: OCS, ECS & AGA
And here is a video about some of the software I use, and have used, on the Amiga.