A: Like you, the majority of Home Base Holidays members able to do non-simultaneous home swaps are listing a second home for exchange. You can easily see which are second homes by the house icon with the number '2' (as above) beside such listings in the brief descriptions you first see when you do a search. You can also confine your results to only second homes by using Advanced Search. Tick the Second Home box (you can also choose country, city, etc) and click Search (bottom right of the page).
Members interested in non-simultaneous exchanges will indicate within their descriptions when their homes would be available. Information can also be included in the destination box to draw attention to the fact that your home can be available at other times than the dates you want to be away yourself, e.g. Open to offers (can be non-simultaneous).