Lets hope he finds a buyer because then you will be protected under the transfer of undertakings TUPE, which ensures you are part of the business and the new owner has to keep you.
However if the current boss goes bust, shuts the doors, or if a new owner decides to reduce staf numbers, then you will be entitled to redundancy pay.
If the boss goes bust yiur redundancy payment is part of the creditors list and high up in priority.
My advice is to go to your nearest citizens advice office and speak to someone. They helped us when this happen to MrM and he got his redundancy money albeit in part payments as the boss was forced to pay his debts.