Regular investors can invest in any offering as long as it is not designated as being available only to accredited investors. A non-accredited investor is anyone who does not meet the income or net asset requirements for an accredited investor. This means they must make less than $200,000 per year ($300,000 when including a spouse) and they must have less than $1 million in assets (excluding their primary residence).
Non-accredited or regular investors make up the bulk of the investment world. They are limited in the amount they can invest annually. Investors who make less than $!00,000 per year can invest the greater of $2,000 or (the lesser of) 5% of their income or net worth. For investors who make more than $100,000 (but less than $200,000), they can invest the lesser of 10% of their income or 10% of their net worth up to a total of $100,000.
See also: Accredited Investor