Tokyo is much more expensive than Beijing./东京比北京物价高得多。

A: Yes, I like visiting Beijing very much.Notes 注释 1. To talk about prices, for example, rents / rents, you can say:  Prices are very reasonable. / Prices are very reasonable or: Rents in Tokyo are higher than London, New York and Paris. / Rents in Tokyo are higher than London, New York and Paris.
要谈论物价，例如，rents /房租的价格，你可以说：Prices are very reasonable. /价格非常合理。或者：Rents in Tokyo are higher than London, New York and Paris. /在东经租房子比在伦敦、纽约和巴黎贵得多。

A: 是的，我非常喜欢来北京。

B: So do I. I rent an apartment here. Prices are very reasonable.

B: 我也是。我在这里租了一间公寓。价格非常合理。

A: Yes, I lived and worked in Tokyo before. Tokyo is much more expensive than Beijing.

A: 是的，我以前在东京住，并在那里工作。东京的物价比北京高得多。

B: People say rents in Tokyo are higher than London, New York and Paris.

B: 人们说在东京租房子比在伦敦、纽约和巴黎贵得多。

A: I'm sure that's true.

A: 我肯定这是真的。

B: But Beijing is more expensive than a few years ago.

B: 但是北京的物价也比几年前高了。

2. To compare prices now with the past, for example, a few years ago, you can say: Beijing is more expensive than a few years ago. / Beijing is more expensive than a few years ago.
要比较现在和过去的物价，例如，现在和几年前的差别，你可以说：Beijing is more expensive than a few years ago. /北京的物价比几年前高了