Be careful !
For companies like HP, you're not supposed to discuss about your salary. If HP offers you similar pay as your current salary, it's not a bad deal, consider what working experience with HP can offer you in your future career. Salary is just one part of the benefit of working for a good company like HP.
You can't compare with people with similar background or same number of experience. Different people, different manager, different job requirement, different market can make lots of differences.
My experience with HP is that, if you're really good, salary can increase quite fast. If you're just so-so, salary may not increase or increase very little.
I joined HP in Singapore in 1993, after working for a small Singapore company for close too two years. They offered my higher salary than I asked for. The working environment is much much better than small company. Within a year, I joined a team of experience US engineers to work on a HP calculator from start to finish. Within 3 years, I relocated to HP US.
Looking at the total benefits, looking at longer term, do not just look at starting salary.
You also need to consider:
1) How many people would want that job?
2) Do they really need to pay you higher salary?
3) How tough is the job?
4) Did you do really well in interview?