Can I download from a real serial port?

I have a PC with serial ports, can I download to a nano that lacks FTDI?
It looks like Pro Mini atmega328 5V 16M Replace ATmega128 Arduino Compatible Nano NEW | eBay

I being using a regular Arduino with USB port but want to try this new tiny board.
Please give some steps.

merlysys:
I have a PC with serial ports, can I download to a nano that lacks FTDI?
It looks like http://www.ebay.ca/itm/131053554958

Don’t try it as you will probably damage the Nano. A standard RS232 serial port could be outputting upto +15V to -15V and your Nano only wants TTL level of 0V to 3.3V/5V. You can buy cheap FTDI converters on eBay.

Or an inexpensive RS232 module:
http://www.nkcelectronics.com/rs232-to-ttl-converter-board-33v232335.html
http://www.nkcelectronics.com/RS232-to-TTL-converter-board-DTE-with-Male-DB9-33V-to-5V_p_369.html
Or RS232 to USB adapter:
http://www.nkcelectronics.com/USB-to-Serial-Adapter-Cable_p_423.html

Would this work?

Its based on the MAX3232 so works at 5/3/3
Its much cheaper than the $9.95 ones in your links, is there a difference in terms of performance? Same IC in both I think.

Nano works at 5 or 3.3 Volts?

Yes.
"Item will be shipped out within 48 hours upon receipt of your payment. Usually it will take 12-24 days on delivery."
Are you very patient?
Nano works at 5V.

Could also buy MAX3232 for 56 cents, add the 5 caps, and a connector, and be up & running in just a couple of days.
http://www.dipmicro.com/store/MAX3232