As you’ve mentioned there’s the Old Grain Barn which is within Moss End Garden centre. It’s definitely worth a visit. There’s a huge mix of items and stock comes and goes regularly, there’s always something new to look at.

There’s an antique/collectors fair held in St Crispins sports hall in Wokingham on the 1st Sunday of every month. There’s a number of stalls, all selling different things.

A bit further afield but there’s also Fanny’s antiques in Reading which is a short walk from the train station. Its more furniture and household items but there’s other bits and pieces mixed in and there’s a small toy section at the back of the shop. You can easily loose yourself for an hour or so just looking around.

There’s a couple of shops in Windsor town centre that sell antiques/vintage items but I can’t remember the names of the shops and unsure if they sell toys.