go to the deserted fairground. it is a little more expensive than the other kiosks but you have a better cance at nabbing a rarer card. However, you should just go to the one in the ice caves. Its way more dependable then the deserted fairground.
I can't say I've bought much of the other cards, but here's my 2 cents on Lost Desert Scratch Cards. For the Lost Desert scratch cards, the more common ones are Scorched Treasure (about 60np profit), then Coltzans Cash (200 and a bit profit), then Suteks Riches (1000np profit0, then Geb Gajillionaire (about 5400np profit) , then Baggus Bonanza (been a while since i've got it but sold it around 24,000), and finally Sandtravaganza (sold it around 150,000nps but they seem to be selling much more now). I've been doing Lost Desert Scratchcards since they started appearing, and most of them you'll get are the Scorched Treasure scratch cards, and then a percentage less as you go up. But sometimes the prices fluctuate, a few months ago you were able to make several hundred neopoints profit just on the Scorched Treasure card. But it's not worth it to buy it just for those, you buy them in hope of getting the better ones. And I suppose you could scratch them. I don't. A good thing about it is that the time in between buying them is less, and you'll always make a profit, unlike some of the other scratch card places.
I believe all of the scratchcard kiosks are under maintanence right now. They've been like that for a couple months now.
i like the one in the ice caves because its the cheapest (600np) but its under maintenance, so you cant use it
i think it down due to people know how to hack it and win the jacpot thats why. and i didnt know it was down till now i just got back on everything again.