I think bingo would be a good listening activity for this lesson. Rules as follows:

1) I'll give the students a small piece of paper and have them draw the grib for a 3x3 bingo card.
2) Students will write numbers 100,200, 300, ect and 1000, 2000, 3000, ect (up to 900 for hundreds and 9000 for thousands)
3) I will then have the students ask me "How much is it?"
4) I'll "It's (number) won."
5) If the students have it they can make a small mark in the corner of the box.
6) First student to have 2 lines of bingo is winner.

The beauty of this game is that it can be played multiple times and all it requires are some small pieces of paper (and maybe some candy if you have it)

The Price Is Right Memory Game

Guess the CU price game.  Original idea and format by Mrs. Baia (http://mrsbaiasclassroom.blogspot.com/2015/11/cu-guess-price-game-how-much-is-it-esl.html).  She made 7 questions, and I expanded this to 20 questions.  Prices are accurate as of last year.  Multiple choice.  Edit:   Definitely check the CU website for the current prices.  A few changed since the time I made this (if you think your students will notice).

Here is a guessing game with ten questions to practice - How much is it? It's __ dollars. Students can simply raise their hand to indicate their guess, or they can write down their answers, in pairs / teams etc. Enjoy. :)
https://youtu.be/j4VECKzj_g0

Battleship game. You can make up the rules however you like.

These are the props I will use for my roleplay. I'd print them on large A3 paper, let the students cut them out, use magnets on the whiteboard, and let the students count the money. Students should be able to buy two items. There's only 1 5000 won bill and 15 1000 won bills, so they'll need to count from 6,000 to 20,000won. I'll post my roleplay script when it's finished.

intro ppts and pirate speaking game

Here's a video I made for this lesson. Hope it can be useful.
How much is the toy car?

Odd letter out game to practice spelling the key vocabulary. Have the kids pick out the incorrect letter before time is up.

Round 1-3: Find 1 Letter, Round 4-5: Find 2 letters,  Round 6: Find 3 letters

Key Expressions:
1. skirt
2. sweater
3. t-shirt
4. jump rope
5. soccer ball
6. baseball glove

https://youtu.be/JCG_s6fLK_E

Shark/Fish writing telepathy game plus a worksheet that I made to go with it~