Looking to buy a Tarptent Stratospire (mainly so I can add the sidecar for my pups) but will consider other models where the dogs may fit in too. I am located in Australia and the price to buy a new Stratospire 2 with postage is approx US$444. I am hoping to get that somewhere around $300 if possible for something 2nd hand but open to negotiation (especially if the sidecar is involved)! Any help would be much appreciated :)