There has been quite a lot of growth in the 7 and 8 string guitar market over recent years and Ibanez make some of the most popular models especially now that they have their Premium line. The next 7 string to become a Premium offering is the UV70 based on the 20 year old Ibanez Universe designed with Steve Vai. According to Musicradar.com it will come fitted with DiMarzio Blaze pickups and will cost £989 in the UK.
Ibanez UV70

Proof that the 7 string guitars are becoming very popular is the introduction of the GRG7221, which at £199 is possibly the cheapest 7 string on the market in 2013?
Ibanez GRG7221

Another bargain extended range guitar from Ibanez in 2013 is this RG8 which will only cost £349.
Ibanez RG8