Hello , Jane . What do you do in your spare time ?   Well , nothing special , reading , watching TV , walking , and so on .   Don't you have any hobbies , like stamp collecting or things like that ?   No , I don't have any hobbies . How about you ?   I like collecting antiques . It's expensive , but it's a lot of fun .   Really ? How many collections do you have ?   So far I have more than 500 collections .   Among those collections , which is the most expensive ? 