I happen to be into cars, so, arbitrarily say that the gift was to be a car. It could be any car produced in the world today, up to a value of $500k. If it were you, what would you want, and why would you want it.
Do not tell me why I should select you - that part would be totally random, maybe by a dart toss or something similar.
.... and, since the odds in this particular lottery are such that I am more likely to be struck by lightening a dozen times then to win it, please remember that it's all a fantasy.