Wire question (with pics) condition and guage

O.K, picked up this wire today.

Got about 60 meters of it (180ft)

Question 1/.
What guage would this be? Pictured next to a standard piece of 240V, 10A solid core house wire (still insulated) as a reference (sorry, foggy pic)





It has 7 strands of solid wire, NOT twisted together. Pretty heavy. A 1.5 meter (5ft) length weighs 250grams (after stripping)





Question 2/. Could the yard de-value this due to its condition? have you had that happen to you? The reason I ask is that if they may do this, then I might not bother stripping it all... you can see my dilema



To the naked eyes the copper is almost black. here is a pic next to some bright single core house wire for comparrison. Pic is a little misleading, it was as black as the insulation it was wrapped in (pic 1.)




I will be taking a sample in to my yard to ask them, but its Saturday, and I can't be stuffed LOL, so I figured I would ask the well educated folk here @ SMF.

Thanks.