Is this EP rare since it's self-released?

Yes, it is a self-released item from 2010, which suggests limited initial distribution.

What is the format of the Spectronic EP?

The item is available in MP3 file format.

Name: Computer Magic – Spectronic EP (File, MP3)
Brand: Computer Magic

Electronic

What Spectronic EP by Computer Magic is worth on the used market.

Label · Not On Label (Computer Magic Self-released)Format · File, MP3Genre · Electronic

Used

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New / Sealed

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Price data verified against · 1

Spectronic EP by Computer Magic (2010) on File, MP3. The Discogs marketplace floor is null with 0 copies currently for sale.

Pressing, country, and condition (media + sleeve) move vinyl/CD values the most — first pressings and clean copies command a premium.

Is this EP rare since it's self-released?: Yes, it is a self-released item from 2010, which suggests limited initial distribution.
What is the format of the Spectronic EP?: The item is available in MP3 file format.
When was the Computer Magic – Spectronic EP released?: It was released in 2010.