Can someone tell me what this is & if it's worth anything?

I live in Australia and someone gave me a Pink Floyd LP box set back around 1993 and haven't played them more than once or twice so they are in near-perfect condition (have mostly CDs and tapes). Not even sure what it's called as the box has no words and only a Dark Side of the Moon-style design, but I suspect it may be the "Gift Set" released in 1991. The 10 LPs are:

1969 More
1969 Ummagumma
1970 Atom Heart Mother
1971 Meddle
1972 Obscured by Clouds
1973 Dark Side of the Moon
1975 Wish You Were Here
1977 Animals
1971 Relics
1973 A Nice Pair

Didn't actually think they were worth anything of note UNTIL I saw an eBay listing for an Atom Heart Mother LP that went for over US $100: http://cgi.ebay.com.au/ws/eBayISAPI....016633882&rd=1

It states that it is a "rare SQ Quadraphonic System copy" (whatever that means?) and the one in my possession appears to be as well (as the photo from the listing is identical to mine with "Q4 SHVL 781, 1970" printed on the label).

So I guess my questions are:

1. What is the name of this released box set?
2. Just how rare is it and which, if any, of the LPs are worth anything?
3. What might the box set be worth as a whole?
4. What does that "rare SQ Quadraphonic System copy" thing mean?

Thanks so much for any help!
Tash

I also happened upon this box set when I was in Australia and although it was in a pretty pitiful condition, with at least one original LP being replaced by a later re-issue, the guy wanted, if memory serves me correctly, around $110 for it.

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Sorry to bump but this is kinda weird.

Cleaning out my bookmarks and checked back on that Ebay auction listing. Mysteriously, the price has since dropped by approximately 75% to US $24.99 (AU $34.51). I guess it may not have been worth what it originally went for.

I'm guessing this sort of thing happens when someone renigs on a bid?

Anyhow, thanks...

Well a box set of CD's is worth about $300 used...

Im assuming if this is in top condition, it would be worth a stack more.

Wher abouts in Australia are you?

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