Leviticus 5

" ‘And it shall be, when he is guilty in any of these matters, that he shall confess that he has sinned in that thing; and he shall bring his trespass offering to the Lord for his sin which he has committed, a female from the flock, a lamb or a kid of the goats as a sin offering...If he is not able to bring a lamb, then he shall bring to the Lord, for his trespass which he has committed, two turtledoves or two young pigeons: one as a sin offering and the other as a burnt offering...But if he is not able to bring two turtledoves or two young pigeons, then he who sinned shall bring for his offering one-tenth of an ephah of fine flour as a sin offering." vv.5-7,11

Read chapter 5.
There is one exception to offerings and that is poverty.  There is still an offering required for the poorer but the same forgiveness is received.  No matter an offering of a lamb, goat, turtledoves, pigeons, or fine flour the result is the same, they're all forgiven even if it was the same sin.  This doesn't mean that if one can afford a lamb they can offer a pigeon, it's still giving the bests to the Lord just as the fat that was divided from the animal in chapter four and given for the Lord alone because it was the best part.  How often today too do we say that certain sins need certain payment to be forgiven?  How often do people put sins on different levels or forgiveness on levels to be forgiven?  Christ died for ALL and forgave ALL.  Not only for those that are good, or not too bad, but even the "worse" in mans eyes. This was taught in the law even before Christ died for us, that forgiveness was and is to all. It's one thing to say and the other thing to believe or think in you mind.  What makes that hard for you to always believe?