I bought Montana couple weeks ago and wasn't impressed. It smelled quite synthetic and cheap to my nose, didn't know what to think of it. I can see the similarities with Havana in the top notes but the drydown is very different imo. I decided to sell it..
As for Havana, I don't think it's that expensive at all. Pops up on ebay all the time I even doubt it's been completely discontinued. Last time someone sold 50ml BNIB for £17, 100ml goes for btw £30-35 (I bought mine for 32GBP) which is less than retail prices of many designer frags in production.