How does one find out other's wages without being rude or unprofessional or whatever...

I'm pretty sure I'm earning less than everyone in the office. This is just from conversations I've heard and people telling me what they're going to buy with one months wages etc...

I will do some research on my market value...

I'm unsure EXACTLY how the pay structure works, but I'm pretty sure everybody gets paid differently. Some people won't talk about their income at all, just out of principle I think.

When I was offered my job back in September, I did ask if there was opportunity in the future for my pay to increase and his words were: yes just be patient.

Originally I wasn't going to be in Sales, as I was an apprentice moving around the company, so I did a 3 month stint in Sales, and ended up staying for 7 months and was offered a permanent job. I do kinda feel its too soon to be askin for more money, as its only may 2011 now, (8 months in to my permanent role). Perhaps at one year?