Individual chess sets cost €1.19 / £0.99 / $1.65 each, and are as follows:

Halloween Chess Set
Easter Island Chess Set
Battalion Chess Set

Chess game packs cost €1.99 / £1.59 / $2.69 each, and are as follows:

Roman Game Pack (Roman themed chess set & Roman-inspired environment)
Park Game Pack (Park animals themed chess set & leafy park environment)
Forest Game Pack (Isle of Lewis chess set & calm forest environment)