Hi simmey,
It is a safe bet that prices will once again go up next year, however, it will probably still remain the cheapest place in Europe to holiday.
We have just returned from Sunny Beach and despite people saying prices had risen this year we could still buy a pint of lager for 1 lev ( 43p) all over the resort. Average meal for 2 in places like Condor, Fara or Djanny's would set you back about 25-30 lev ( drink included ). Cocktails are usually 2 for 1 at about 6-8 lev.
Supermarket prices are cheaper again, a bottle of lovely red Kadarka wine was only 3 lev, a large Zagorka beer 1.5 lev, 5 litres of water 2.60 lev. 200 cigarettes were 33 lev
Even with a rise next year you will find it a lot,lot cheaper than Spain.

Toonman