Other sources: Internet search under discount brokerage or mutual funds. Also the March issue of Consumer Reports often lists an array of mutual funds with 800 numbers.
Most custodians will accept a lower initial if you commit to monthly direct contributions from your checking account. Ask. Examples:
Oakmark funds have a $500 minimum if you also committ to monthly contributions. See:
http://www.oakmark.com/forms/irca_app.htmTIAA-CREF apparently has a $50 minimum if you are going auto monthly. See:
http://www.tiaa-cref.org/pdf/iras/mfirains.pdfAlso, you can start a savings plan right now to accumulate the minimum and then open a Roth when you accumulate enough funds. You won't earn a lot of interest on small amounts, but if you are dilligent in saving, you will reach the minimum soon enough.
I am not recommending that you buy stocks at such a low level, but you will find low mimums at:
http://buy-stocks-online.com/ . . . . low as in zero.
Banks typically have low entry levels - but not all banks have good investment options or low annual fees.
Don't forget to factor in service and convenience. Ask lots of questions. Most companies really value new Roth customers because they stay for a long time. You can also just plain ask them to waive the initial amount or waive the annual fees. (not all have annual fees, something to ask about)
Good luck.