The stalls selling packaged food and drinks will tell you escalated prices and say "yahan pe yehi prices hain". Dont fall for it. Ask to buy ONLY at MRP. They'll have to oblige. Jaago grahak jaago ;-)
If you are looking to travel to Chandigarh, aways prefer the Haryana Transport volvo over the Punbus volvo/Mercedez Benz, given a choice. They have an added "leg rest" which makes all the difference.