Skeleton,
The points regarding the choice to patent or not by the other posters are valid. In many cases patents are obtained to protect a certain feature/benefit that would prevent others from using. However, if a
significant improvement is made on another persons rendition, that could bypass your patent as I understand. Although I am sure bonafide legal arguments could be made if you have the money to go at it.
Turning over your idea may provide you instant "distribution" and marketing. Selling it on your own may provide you greater profit with lower sales. There are pros & cons on both.
Here is a few things I "learned" navigating the locksmith industry with some of my creations when it came to such things.
Be aware of the compensation should you choose to turn your idea over to others in this business. Know the difference between your "percentage" on each sale overall or a percentage based on cost to distribution. BIG DIFFERENCE. If you are being given a percentage such as 5%, be clear on what that is based upon. Should it be the price to distribution, then you will be making pennies compared to an overall sale price percentage. Remember, distribution can make returns so any initial sale could reverse itself. You can, if you must take such a low return ask for a "back end" compensation opportunity based on volume where you can get another percentage tier based on total sales within a period. This is a good thing if what you have is "hot".
Just be aware, once you turn over your idea, you lose control of the ability to decide how and when things are driven and marketed. For the most part you will be okay, if you have an item that can sustain itself. If however, your idea needs to be driven hard because of its life cycle, then you need to ensure what the terms of distribution will be unless you are given an upfront "product rights" settlement.
By asking for a cash payout upfront for someone to have control of your idea, you can pocket some money before any returns come in and this is an incentive for others to shake and move on your idea in order to get their investment back. Keep in mind this is all dependent upon who is manufacturing and marketing your idea.
If you do not have the money to get a patent and if it is attractive for another party to fund such a venture, then you may want to think about doing so with a "provision" that you are recognized as the inventor of the concept and that royalties in "perpetuity" can be
transferable to another family member upon your demise.
You also need to decide if the idea you have will be turned over to someone with "exclusivity" and for how long. Another thing to consider, will the party funding your patent, distribution and marketing be allowed to set the price or are you expecting a Minimum Sales Price (MSP) not to be exceeded. Often your pricing will also protect your idea from being copied since others will not wish to spend the money to create their own rendition if you saturate the market aggressively and limit their sales potential.
So before you leap you need to consider some of these things. In short, are you looking for a "short run" on your products life or a "long run". Just remember nothing is forever unless you have a patented feature that is "unique" which can protected, sold off or which others simply do not wish to challenge or see no benefit in tooling up to knock off.
http://www.freepatentsonline.com/6824335.htmlIf I can help you, just ask.