I loved the metal tone of this amp when I played it at a music shop a while back. And theirs a guy a know selling one for $1000 as he's moving overseas

Here in Australia the 100 retails for about 1900-2000 so its like half price. Seeing as its a 2006 model, are there any things i need to worry about maintenance wise?
You might want to change the tubes unless the guy already changed them last year or so.
Fender American Special HSS Stratocaster
Ibanez 1987 Roadstar II Deluxe
Yamaha THR10X
Marshall JCM900 SL-X
Ibanez WD-7 Weeping Demon Wah
TC Electronic Polytune
Seymour Duncan Tweakfuzz
You should always buy spare tubes when you get a new amp anyway, especially a used one. Even if you don't need them you will eventually.
Gilchrist custom
Yamaha SBG500
Randall RM100 & RM20
Marshall JTM45 clone
Marshall JCM900 4102 (modded)
Marshall 18W clone
Fender 5F1 Champ clone
Atomic Amplifire
Marshall 1960A
Boss GT-100

Cathbard Amplification
My band
dude go ahead and get it, you wont be disappointed and at those prices you mentioned that sounds like a good deal. I've had my dsl for over a year now and absolutely no problems yet. I had the dealer install new tubes before i bought it so judging on how well ol' dude took care of it you might have to invest in some tubes like everybody else said but other than that its a fine amp.
yeah im planning on buying some TungSol 12AX7's and some JJ Tesla EL34's

Would that be a good combination for thrash metal?