Have you done any research on this species, and are you prepared to provide a large enclosure for this animal?
Timor's are really great "pet" monitors. They are very shy and reclusive, don't like to be handled, and can stress out very easily. I would give them a large enclosure with items that they can climb around on, because they can and will utilize such items.
It sounds to me much like an impulse purchase, I hope you've done your homework.