Investment range is USD 150,000 - 300,000
Not exactly sure what you mean. Typically you get an exit either because the company in which you invested is acquired or it goes public (there are other options, but those are the normal ones). Angel investors usually consider the acquisition potential when making an investment. If there are a lot of potential acquirers, that is better than if there are very few options. What is your specific situation and what do you want to know?
Check private equity firms and serial entrepreneurs to buy your share..
Also, other equity holders / employees in the company will be another good option if the company is really good.
It all depends on what the investment was in. If the company you invested in is doing very well, you always want to convert that investment into equity if you feel the company is going places. If you feel that it is going bad and you have an option to be a) bought out at your original investment or even at a small loss, I would do it. b) If you are offered a ROI then definitely take it and run (if the company you feel is not going to make it)