Many people store native plant seed quite effectively without spending a lot of money.
Low cost storage can be very effective in the short term if basic rules are understood and followed. However, all seed cannot be stored at low cost for all purposes. In general, we store seed to maintain it in a viable condition from the time of collection until the time of sowing. Storage time varies according to the purpose for which you store it and the longer you need to store seed, the more expensive it gets. In revegetation work for example, seed is generally collected with the aim of sowing it as soon as possible in the next growing season.